A manhole is a covered opening in a street or sidewalk that allows workers to climb down into underground tunnels where pipes, electrical cables, and other important systems run beneath the city. The round metal covers you see in roads are manhole covers, designed to be strong enough to support cars driving over them while still being removable when workers need access.

Cities have vast networks of tunnels underground for sewers, water pipes, electrical wires, and communication cables. When something needs to be repaired or inspected, workers can't dig up the entire street. Instead, they lift the heavy manhole cover and climb down a ladder built into the walls of the shaft. These underground passages are usually just tall enough for a person to move through, with enough room to carry tools and equipment.

Today, people of any gender work in these roles. Some cities now use terms like maintenance hole or utility access point instead, though manhole remains the most common name. These openings are essential to modern city life: without them, fixing a broken water pipe might mean tearing up an entire block of street.